IMHO, those aren't bad numbers for hot oil. Some people would like to see a little more idle pressure, but 15 to 17 hot is not bad. Certainly not worth a tear down unless there is something else amiss. I would run it.

Now if you can't sleep at night over it, how about a high volume pump or heavier oil? I wouldn't make either change based on what you have given us, but they are possibilities.